All ports
Port3923/TCP
symb-sb-portPort
3923
Protocol
TCP
Category
Registered
Service
symb-sb-port
What is port 3923?
Port 3923/TCP is a Registered port, registered with IANA for specific applications. It is associated with the symb-sb-port service.
Symbian Service Broker
Useful commands
nmapnmap -p 3923 -sV example.comnetcatnc -zv example.com 3923curlcurl -v http://example.com:3923/telnettelnet example.com 3923bash(echo > /dev/tcp/example.com/3923) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3923/tcpDeny
sudo ufw deny 3923/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 3923 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 3923 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3923/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3923" dir=in action=allow protocol=TCP localport=3923Security Risks
- Unauthorized access to the service
- Data exposure if the service is unauthenticated
- Outdated versions with vulnerabilities
- Incorrect service configuration
Frequently Asked Questions
What service runs on port 3923/TCP?
Port 3923/TCP is associated with the symb-sb-port service. Symbian Service Broker
Is it safe to expose port 3923 to the Internet?
It depends on the service and configuration. Port 3923 (symb-sb-port) is a Registered port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.
How do I check if port 3923 is open?
You can use nmap: `nmap -p 3923 -sV example.com`, netcat: `nc -zv example.com 3923`, or the bash command: `(echo > /dev/tcp/example.com/3923) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3923 on my firewall?
On Linux with UFW: `sudo ufw allow 3923/tcp` (open) or `sudo ufw deny 3923/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 3923 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3923" dir=in action=allow protocol=TCP localport=3923`.
What applications and services use port 3923?
Port 3923/TCP is used by the symb-sb-port service. Specific uses depend on the software and configuration. Check our related tools section for more information.